BeoLab 2: how to switch on without 5 volt trigger?

14 replies
KolfMAKER
Offline
KolfMAKER
Bronze
Posted August 21, 2022 at 09:50 GMT
#1641191
I am in a try-out project to see if I can drive a BeoLab 2 subwoofer wirelessly. This means that I have to connect the Audio-IN of the wireless module, to pin 1 & 4 of the Powerlink. This is no issue. What I do wonder about, is how to get the BeoLab 2 to switch from stand-by to ON. It needs a 5v signal to switch to ON.   Question
  • Any ideas how to get the stand-by to ON switching done, in this setup?

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
Beosound-9000.png Beosound-9000.png
Beolab-18.png Beolab-18.png
Guy
Offline
Guy
GoldModerator
Posted August 21, 2022 at 14:09 GMT
Edited August 21, 2022 at 14:11 GMT
#1648486
I don't think there's an easy way to do it, however some thoughts:
  • Perhaps you could connect the audio out of the wireless receiver to the aux input of one of these: 

Location: Warwickshire, UK

My B&O Icons:

BeoCenter-9500.png BeoCenter-9500.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beovision-10.png Beovision-10.png
Beotime.png Beotime.png
Beosound.png Beosound.png
Beosound-Explore.png Beosound-Explore.png
Beosound-Essence.png Beosound-Essence.png
Beoplay-P2.png Beoplay-P2.png
Beoplay-M3.png Beoplay-M3.png
Beoplay-H4.png Beoplay-H4.png
Beoplay-H3.png Beoplay-H3.png
Beoplay-Form-2i.png Beoplay-Form-2i.png
Beoplay-Earset.png Beoplay-Earset.png
Beoplay-A2.png Beoplay-A2.png
carolpa
Offline
carolpa
Bronze
Posted August 21, 2022 at 16:51 GMT
Edited August 21, 2022 at 16:51 GMT
#1648488
KolfMAKER
Offline
KolfMAKER
Bronze
Posted August 21, 2022 at 17:29 GMT
#1648489
Thnx very much Guy & Carolpa!

The Playmaker, BeoSound Core or Essence are unfortunately no options for this project. I am looking at a way to integrate the streaming completely inside the speaker casing. So no PowerLink cables, only a power cable and no boxes outside the speaker casing.

So I wonder if the 5v triger is something I can create somehow inside the BeoLab 2.

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
Beosound-9000.png Beosound-9000.png
Beolab-18.png Beolab-18.png
SI
Offline
Sia43
Bronze
Posted August 21, 2022 at 17:53 GMT
#1648490
This youtube video (https://www.youtube.com/watch?v=ivTnjK5mLV0) shows a product that seems similar to what you are planning to do. It might be small enough to be built inside the Beolab 2 (just guessing).

It seems like the trigger is going on as soon as a line signal is received and turns itself off after 6 minutes with no signal. I wanted to buy two of these for my Beolab 2000s, but unfortunately, the provided eBay link doesn't seem to work.

In case you find the product, please let e know.
matador
Offline
matador
BronzeModerator
Posted August 21, 2022 at 20:25 GMT
#1648492
link
It seems like the trigger is going on as soon as a line signal is received and turns itself off after 6 minutes with no signal.
I've always wonder why no electronic Guru" ever made that kind of thing: a box that amplify audio signal enough to trigger a relay with a timed auto hold that could power up any Beolab from a line in signal. I say this as an ignorant but theoretically it doesnt seems so from an outer world, no? Even by retro engineering the RCA line in part of a Beolab 4/6/8 x1000. Just a thought.

Location: Paris France

KolfMAKER
Offline
KolfMAKER
Bronze
Posted August 22, 2022 at 11:19 GMT
#1648499
@Matador

Very interesting approach!

This is obviously the way B&O equipment handles it.
I would be very much interested in a electronics scheme, and make such to try it out.

Any chance you know how such would look like?

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
Beosound-9000.png Beosound-9000.png
Beolab-18.png Beolab-18.png
matador
Offline
matador
BronzeModerator
Posted August 22, 2022 at 12:24 GMT
#1648503
It would look like a little box with line-in and line-out sockets and a 5V input (or whatever is need to start the Beolab AND power the box circuitry.

Inside there will be a relay or something similar that would be triggered by the amplified Line-in signal (sound). The relay would have an auto hold loop with some sort of timing circuitry (I.E it would stick for "some" time when no sound is present and then open).

Output of the relay will trigger or not the 5V to the Beolab.

Now, Please note that I'm totally ignorant of how it could impact sound (since we're playing with the main audio feed, but as far as I remember my electronic classes, this is not NASA technology here.

Location: Paris France

Guy
Offline
Guy
GoldModerator
Posted August 22, 2022 at 13:11 GMT
#1648504
Maybe something like this (the 5V trigger version) would be suitable:

Location: Warwickshire, UK

My B&O Icons:

BeoCenter-9500.png BeoCenter-9500.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beovision-10.png Beovision-10.png
Beotime.png Beotime.png
Beosound.png Beosound.png
Beosound-Explore.png Beosound-Explore.png
Beosound-Essence.png Beosound-Essence.png
Beoplay-P2.png Beoplay-P2.png
Beoplay-M3.png Beoplay-M3.png
Beoplay-H4.png Beoplay-H4.png
Beoplay-H3.png Beoplay-H3.png
Beoplay-Form-2i.png Beoplay-Form-2i.png
Beoplay-Earset.png Beoplay-Earset.png
Beoplay-A2.png Beoplay-A2.png
tuttivini
Offline
tuttivini
Bronze
Posted August 23, 2022 at 21:08 GMT
#1648552
Why don't you use a 'beolab trigger cable for this?

Soundsheavenly makes them.

powmasscables makes them.

Or make it yourself. Put 2.5~5v on pin 4 and pin 7 for ground and all beolab speakers switch on...
or
BeoWorld Gold Membership card
Join BeoWorld

Register to access the forums, reference material, and exclusive member benefits — including our monthly prize draw.

Become a Member

December 2026 Prize Draw

Gold Members Only

As a Gold member you're automatically entered into our exclusive prize draw — your chance to win iconic Bang & Olufsen products. A unique benefit of BeoWorld Gold membership, every draw brings a new opportunity to win something special.

View Prize Go For Gold